Right-click contex menu doesn't work
http://www.myeclipseide.com/index.php?name=PNphpBB2&file=viewtopic&t=15728http://www.eclipseworld.org/bbs/read.php?tid=9920
This is a known problem when installing the 5.1 release of MYEclipse into an install of Eclipse that has the JST and WST plugins already installed (it supreceedes our versions of the plugin that need to get loaded).
The workaround is to load the manage configuration dialog from Help > Software Updates > Mangae Configuration. Then find the JST and WST plugins from your Eclipse install (probably under WTP) and disable them, then restart.